TRUTH TABLE

INPUTS

FUNCTION

RCK

CLOAD

CCLR

CCKEN

CCK

X

L

H

X

X

REGISTER DATA IS LOADED INTO COUNTER

X

H

L

X

X

COUNTER CLEAR

H

H

X

X

THE DATA OF A THRU H INPUTS IS STORED INTO REGISTER

H

H

X

X

REGISTER STATE IS NOT CHANGED

X

H

H

L

COUNTER ADVANCES THE COUNT

X

H

H

L

NO COUNT

X

H

H

H

X

NO COUNT

X: Don’t Care

RCO = QA’

• QB’ • QC’ • QD’ • QE’ • QF’ • QG’ • QH’

(QA’ to QH’: Internal outputs of the counter)

TIMING CHART

M54/M74HC592

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